Perimeter of a rectangle
You learn to find the perimeter: how far it is all the way round.
How to work it out
- Add all four sides: length + width + length + width.
- Or do (length + width) × 2.
A rectangle is 3 m long and 2 m wide. What is the perimeter?
- Add all four sides: 3 + 2 + 3 + 2 = 10.
- The perimeter is 10 m.
More examples
A square has sides of 4 cm. What is the perimeter?
- A square has four equal sides.
- Add them: 4 + 4 + 4 + 4 = 16.
- The perimeter is 16 cm.
A triangle has sides of 5, 6 and 7 cm. What is the perimeter?
- Add all three sides: 5 + 6 + 7 = 18.
- The perimeter is 18 cm.